html,body{
    width: 100%;
    height: 100%;
}
*{
    margin: 0;
    padding: 0;
}
body{
    overflow: hidden;
    background: linear-gradient(#cfa7f6, #fcb3dc, #c0ffa2);
}

.bg>div{
    width: 300px;
    height: 300px;
    position: absolute;
    border-radius: 50%;
    filter: blur(5px);
    z-index: -1;
}
.bg>div:nth-of-type(1){
    background: linear-gradient(#cfa7f6,#fff);
    top: 0;
    left: 0;
    animation: animate 8s linear infinite;
}
.bg>div:nth-of-type(2){
    background: linear-gradient(#f1a7f6,#fff);
    top: 0;
    left: 400px;
    animation: animate 15s linear infinite;
}
.bg>div:nth-of-type(3){
    background: linear-gradient(#a7f6d4,#fff);
    top: 0;
    left: 700px;
    animation: animate 20s linear infinite;
}
.bg>div:nth-of-type(4){
    background: linear-gradient(#a7f6bd,#fff);
    top: 500px;
    left: 0;
    animation: animate 13s linear infinite;
}
.bg>div:nth-of-type(5){
    background: linear-gradient(#d1f6a7,#fff);
    top: 500px;
    left: 500px;
    animation: animate 7s linear infinite;
}
.bg>div:nth-of-type(6){
    background: linear-gradient(#ffe3a2,#fff);
    top: 500px;
    left: 1000px;
    animation: animate 10s linear infinite;
}
#myform{
    height: 400px;
    width: 500px;
    margin: 0 auto;
    margin-top: 200px;
    padding: 50px 100px;
    background: linear-gradient(#85ffc8, #54fffe );
    box-sizing: border-box;
    box-shadow: 2px 2px 50px #54fffe,2px 2px 50px #41dbdb;
}
#myform>h2{
    margin-bottom: 10px;
}
#myform label{
    margin-top: 20px;
    margin-bottom: 10px;
    width: 80px;
    display: inline-block;
}
#username,
#password{
    height: 30px;
    width: 100%;
    font-weight: 700;
}
#btn{
    width: 100%;
    height: 40px;
    color: white;
    border: none;
    font-size: 16px;
    background-color: #44d20b;
    margin-top: 50px;
}
@keyframes animate {
    0%{
        transform: translateY(0px) rotateZ(0deg);
    }
    50%{
        transform: translateY(-500px) rotateZ(360deg);
    }
    100%{
        transform: translateY(-1000px);
    }
}